Composition roadway.



B. P. RICHARDSON. loOIIIROSITION ROADWAY. .APPLICATION FILED 00T. 13` 1908` QI 1,445, Patented Feb. 2, m09.

ENJAMIN r; nrcnflnsn, on ,rein-annientarnNNSYLvANIa, As'srsnon 'ro 'ran `ivi-nnaar PAVING Annoonsrauorion 'ooMrANn or wrLMiNeeoN, DELAWARE, a 'Gospel-- RATION OF DELAWARE.

` SON, a citizen of the United:` States, residing in Philadelphia, Pennsylvania, haveinventsedy certain Improvements. in Composition Roadways, of w 4 cation:

ich the following is a specifi- My invention relates to certain im rovements in the method of resurfacingol Macs lo adam or Telford roadways. 1-

, One-object of my invention is to provide-3ra road surface which will .be equal to the original surface of the roadv and' which `willbe 'I Waterproof `so as to prevent the accumulation le Vof water below the surfaceof'the road and insure a more stable surface than has heretoforebeen obtainedz- My invention also relatea to certalnlimf provernents in the water proof composition 2o which l use in ree-surfacing a road.' The gure in the accompanying drawing isl a sectional'viewshowing a lportion of a road resurfaced accprdin to-my invention. 4 v

Referring to the rawing, A illustrates Athe old road-bed, B a layer of asphalt cement, .C a layer of crushed stone and `D a layer of stone screenings.

In re-surfacmg a Macadam or Telford road f "l all dirt and refuse matter on .the old roadway. 30 is rst removed and whenever the roadwayls. out of contour it must be brought to grade either b reducing the vhigh points or by addinn to t e low pomts, while the ruts may be lled with crushed stone of 1.1f inch gage down to 1/10 of an inch gage,l in order to bring the grade and crown of the road to the proper height, as the case may be. After the above operations have been finished, the roadway is thoroughly compacted .40 by rolling,.and for thispurpo'sel prefer to use a steam roller of not less than five tons in weight, although such weight will depend materially upon the character ofthe roadbed. I then coat this prepared surface While dry with a waterproof asphalt cement to an a roXi ate averagel depth o f of an incli. he a. phalt cement is applied While hot'and it may e either sprinkled or oured onto .the surface thou h it maybe app ied by brooming-for by ot er suitable means. This asphalt cement is com osed of bitumen consisting of natural hy rocarbons and suitable fluxes for giving it a consistency suitable for paving purposes. The percentage of bitumeng-soluble in carbon bi-suld shall in no Specification of Letters Patent.

. ,i application and october 1s, 190B. sent! ne. tenete.

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event fall below linet and Shall ilt be aect ed by the vaction o, water. It 'must not oxidize nor be susceptible' to 'atmen heric ine` fluences,I U on this layer of asphat cement I apply' ,crus ed hard stone, preferably trap roc )Such stone must be of such size as to pass through a three-quarter inch mesh and must be dry when applied. This stone sur-:il

facs should be about one'inch in thickness,

thonu roller iould not`be less than five tons in` weight. U on this layer will beplaced one;

half inchofp al wearing surface, shou d alsohe thoroughly compacted by the use of a roller. In no casev shouldfree asphalt cement appear.y upon the surface. After the bed has su-'r `.iently cooled the road canbe thrown open to the public. A

l By the above process'of making a ave# ment I am enabled to re-snrface an old acadam or Telford roadwitla hard waterproof, surface, I which will withstand considerable wear and thrgu h which water, will be unable to pass, thus mann I claim:

hly compactedv by rolling, 'andlthe'e evenly spread dry stone lscreen:l ings VV.(tra rock screenings being referred) and this ,70"

1. The process herein of re-sur` i facing Macadam or Telfordrbads, said proces's consisting in first cleaning the surface or the` old roadway and bringing it tothe ade'l and crown desired by rolling, then app yin l to the pre ared surface onequarter inc thickness o hot asphalt cement, then applying broken stone of about one inch thickness,I i rolling said stone surface', theny applying screenings to about"onehalf`inch in4 thick-l ness, and finally rolling the surface of screen ings so as to produce a smooth roadway with the proper crown and @orou'glly compact the stones and screenings.' Y

2. The process herein escribed of res-sur4 l facing a roadway, saidprocess consisting in preparing the oldroadway so as to give it the' I,

pro er grade and crown, then applying an',-"ff' asp alt. cement consisting -of bitumen coin-- posed of natu-ral hydrocarbons and suitable fluxes, the percentage of bitumen soluble in carbon bi-sulfid in no event falling below ninety, placing upon the coating4 of as halt `cement a Wearing surface composed of t f eequarter inch dry crushed stone to a thickness of one inch, thoroughly compacting the saidlayer by rolling", evenly/spreading thereon eme-half inch difyetone screenings, end lfmey thoroughly eompaetng ibis surface by rolling, the stone bein leid. to prevent the eppefenee ofree asphe t cement upon the surface. 3.' Thel process herein described of re-surfacing Macedem or Telford roads, said procless eoxxsisting in rst cleaning the surface of the old roadway and. brin ing it to the grade and crown desired by reln then eppying the prepared surface e ayer of asphalt cement, then applying e layer of broken one rolling said stone surface, then applying e laye? of screenings mld nely reling the surfaceof' screenings so es to produce smeoth roadway with the proper crown and .thoroughly compact, the stones :md ecreen lugs.

in estimony vvleee'f,n -hmfe signed my neme to this specification, in bhe 'ucseuce of two subscribing witnesses.

BENJAMN F. RIC'ARDSON.

Wftnesses:

HENRY A. Summum, L RALPH NAGLE. 

